Answer:
C. The mass of a nucleus is subtracted from the mass of its components.
Explanation:
The difference in the mass of a stable nucleus and the combined masses of its constituents (i.e. nucleons) is called “Mass Defect” or “Mass Deficit”. It is denoted by Δm.
Symbolically,
[tex]\Delta m = (Zm_p+Nm_n)-m[/tex]
where,
Δm = mass defect
Z = Atomic Number
[tex]m_p[/tex] = mass of Proton
N = Neutron Number
[tex]m_n[/tex] = mass of Neutron
m = mass of Nucleus
Hence, the correct option is:
C. The mass of a nucleus is subtracted from the mass of its components.